Winnebago County, Wisconsin

11 ZIP codes · 434.7 sq mi of land · FIPS 55139

Population171,769
StateWisconsin
FIPS code55139
Time zoneCentral
Land area434.7 sq mi
Center (lat, long)44.0857, -88.6681

Area codes in this area

274920

These are the area codes that most often serve Winnebago County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Cities and towns (largest first)

Oshkosh · 66,729Neenah · 27,336Butte Des MortsLarsenOmroPickettWaukauWinnebagoWinneconne

ZIP codes in Winnebago County

54901 Oshkosh54902 Oshkosh54904 Oshkosh54927 Butte Des Morts54947 Larsen54956 Neenah54963 Omro54964 Pickett54980 Waukau54985 Winnebago54986 Winneconne

Population: U.S. Census Bureau, ACS 5-year estimates, 2024.